Lantern.



`A. ROSBNBERG.

. LANTBRN.

APPLIOATION FILED AUGJB. 1905.

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PATBNTED 00T. 3o, 1906.

,y No. 834,859.

^ A PATENTED OCT. 30, 1906.

A. ROSBNBERG.- f

' LANTBRN.

APPLICATION FILED AUGAB. 1905.

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LANTERN.

APPLICATION FILED AI'UG. 28, 1905.. A.

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PATBNTED 00T. so, 1906.' 4

i UNITED STATES lPATENT OFFICE.

AUGUSTUS ROSENBERG, OF LONDON, ENGLAND, ASSIGNOR TO THE INTERNATIONALOXY-GENERATOR SYN DIOATE LIMITED, -OF LON- DON, ENGLAND.

LANTERN.

Patented oct. 3o, 1906.

Original application filed December 20,1904, Serial No. 237,664. Dividedand this-application filed August l2i?, 1905. Serial No. 276,056.

T a/ZZ whom t may concern,.-

Be it known that I, AUGUSTUS ROSEN- BERG, engineer, a subject of theKing of Great Britain, and a resident of 259 High Holborn, London,England, have invented certain new and useful Improvements in Lanterns,of which the following is a specification.

This invention relates to improvements in lanterns used for opticalsignaling and searchlight operations, and is especially designed for usein Connection with the signaling apparatus for which I made applicationfor Letters Patent on December 20, 1904, Serial No. 237,664, and ofwhich this application is a division.

The invention Will be described with reference to the accompanyingdrawings,where in- Figure 1 is a central vertical transverse section ofthe lantern iitted with a paraflinoil lamp. Fig. 2 is an inverted lan ofthe -bottom of the lantern, showing t e mode of attaching a gas-burner.Fig. 3 lis a part transverse section of the lantern, showing such agas-burner in elevation; and Fig. 4 is a part side elevation of thelantern.

The same reference-numerals denote like .parts in all the iigures. y

1 is the body of the lantern, which is closed and is referably suppliedwith air through .a so-,cal ed top-feed arrangement, whereby ythe air isheated vbefore reaching the point yof combustion land the temperature ofthe ,ame is maintained as high as practicable. Forthis purpose thesides, top, and bottom of the lantern-body are constructed with a.double wall, the inner wall 12 of thelsides .and top being Separatedfrom the outer wall l1 by an air-space 13 and the inner bottom plate 14being separated from the outer bottom plate 15 by an ,air-space 16, kthespaces l I.13 and 16 communicating with one' another ',.the inner wallyofthe lantern. The `airsupateach side of the lantern through a Screen-17, of Wire-gauze, whereby the current of air .passing through thespaces on its way to the point of `combustion is caused to distribute4itself equally over the whole cross-Sectional Tarea of the passageconstituted vby the spaces 13 and 16, and thus'to become equally heatedby `being spread evenly over the surface of ply reaches the top of thespace 13 by wayv of an annular passage 18, surrounding thelantern-chimney, the 'inner and outer walls of said passage being formedby tubes y19 and 20, rising from corresponding a ertures in the top ofthe inner and outer walls 12 and 1 of the lantern. The upper end oftheinner venient distance below the level of flange 21,

another and. narrower auxiliary flange 23 bein preferably providedaround the lip of the tu e 20.

The chimney 24 is made telescopic, so as to be ca able of beingcollapsed as far as practicablle within the lantern-body when not inuse, the lower section 25 being itted to slide through the tube 19. Thechimneycowl 26 may be constructed in any usual manner for preventing theaccess of direct downdraft to the interior of the lantern, and in orderas far as possible to prevent the admission of fluctuating drafts causedby gusts of wind glancing upward from thersides of the chimney, and sogaining entrance beneath the depending outer skirt -27of the cowl, a

flange 28 is provided on the up er section of the chimney at aconvenient evel'V beneath the edge of the skirt 27. n

The lantern-body is closed at rear by a hinged door30, and at each sideof the lantern small apertures 31, registering with one another andconnected by a tube 32, as shown, are provided in the inner and o uterwalls opposite to the iiame for the purpose both of enabling the latterto be inspected and also of affording4 light at night-time for therespective attendants whose duty it is to read out to the signaler themessage to be transmitted and to record the signals Vreceived from thedistant station.

To enable the apparatus to be conveniently carried, a bail-handle 33yispivoted, preferably, tothe flange 21 as -at 34, the'ar- IOO krangementbeingsuch thatlwhenutlle chimney is collapsed the handle can be raisedso as to straddle over the chimney-top.

Fig. 4 shows the details of the preferred construction of a chimneylesslamp for burne ing parafhn-oil and the like, this lamp being preferablyprovided with more than one flat wick arranged one behind the other.

In order that the oil-reservoir 35` may be kept cool, it is supported ata distance beneath the outer bottom plate 15 of the lampbody by lugs 36on the outer wall 1, (which extends below the plate 15,) which entersockets 37 on the reservoir and are locked therein by dowel-pins 38. 39are stops (see Fig. 4) on the reservoir for preventing the completewithdrawal of the pins. The lugs 36 hold the reservoir clear of thelower edge of the wall 1 of the lantern, so that not only is aclearair-space 40 maintained between the bottom of the lantern and thereservoir, but conduction of heat from the former to the latter is asfar as possible obviated. The plate 15 where it is supported at eachside of the lantern by the plate 1 is separated from the latter by astrip 41 of non-conductive 4material interposed between them, the lugs36 being preferably fixed in said strip, as shown, so as to bethemselves insulated from the lantern-body.

The inner and outer bottom plates 14 15 are apertured to give passage tothe lampburner, the shoulder or rim 42 of whose outer cone 43 is adaptedto fit against and so close the aperture in the upper plate 14, while aeoaming 44, upstanding from the reservoir,

encircles and closes the aperture in the lower plate 15. By thisarrangement the only airsupply to the lamp (except as hereinaftermentioned) is that derived from the space 16, separating the plates 14and 15, which air has already become highly heated by traversing thepassages 13 and 13 already described. The heated air passes from thespace 16 through the usual apertured support 45 of the burner-cone 43into the space within said cone surrounding the wick tube or tubes 46,and in order to so. subdivide the stream of air which rises around thewick-tubes as to guard against sudden fluctuations in the pressure ofthe current a perforated diaphragm 47 is provided within the cone 43, soas to extend over the whole area of the airfeed passage therein.

In order to prevent the burner from becoming overheated, a row ofperforations 48 is provided around the upper part of the cone 43, thediaphragm 47 also serving to enable the current of air passing to theburner to abstract a considerable amount of heat from the cone 43 andWick tube or tubes 46.

In order to prevent as far as possible transmission of heat from theburner to the oil-reservoir, there is interposed between thereservoir-top and the shoulder surroundin the lower part of the burner,and upon whic the latter rests, a thick washer 50, of non-conductivematerial, wherein is formed the bayonetjoint slot for securing theburner in position, so that no direct conduction of heat can take placeat this point from the metal burner to the metal top of the reservoir.Moreover, the inner bottom plate 14 of the lantern-body is covered by alayer of asbestos, upon which rests a plate 51 rof talc, so that radiantheat falling upon plate 14 is refiected therefrom. This plate 14 mayalso be insulated by means of non-conductive material from the innerside walls 12 of the lantern, whereby said plate is supported.

To enable the lamp wick or wicks to be adjusted without opening thelantern, a small aperture for the passage of a winding-key for eachwick-adjusting spindle 53 is provid ed, as at 54, in the side of thelantern-body below the level of the bottom plate 15 and a correspendingaperture in the eoaming 44. To prevent the jarring produced by theworking of the Hash-shutter affecting the height of the wick, eachwick-adjusting spindle 53 is braked, preferably by a stiff springattached to the burner and bearing against the spindle, so as to checkits accidental rotation.

When acetylene or other gas is to be employed in place of oil as theilluminant, the lamp and reservoir are removed and a gasburner 55, Fig.3, is introduced through the apertures in the bottom plates 14 and 15and secured to the outer or lower plate 15. For this purpose the burner55 is supported upon the upper end of a metal tube 56, to the lower endof which the flexible tube conveying the gas from the generator orgas-bag is attached, the tube 56 passing through a socket 57, integralwith and extending below a plate 58, which may be perforated and whichcloses l the aperture in the bottom plate 15 and is secured by means ofnotched lugs 5) on the periphery of the plate 53 engaging with headedstuds 60, which project downward from the plate 15. The gas-burner 55 isadjusted for height, so as to enable the brightest part of the flame tobe brought into the optical axis of the lantern by sliding the tube 56through the socket 57, which is provided with a setscrew 61 for clampingthe tube in place. Between the tube 56 and burner 55 is preferablyinterposed a gas-expansion chamber 62, whereby a more equable supply ofgas direct to the burner is insured, or a candle might be mounted in aholder provided with means for maintaining the flame at a constantlevel, as in the candle-lanterns employed on ordinary road-vehicles, thecandle-holder being substituted for the gas-burner and its support, asabove described. A

Other sources of illumination than oil or gas may be used with thelantern-as, for ex ample, the so-called "oxyhydrogen coinbustion orlime-light apparatus or electric- TOO TIO

light ap aratus-the necessary modifications being of) course made in thestructure of the lantern.

I claim- 1. The combination with a lantern-body provided with lugsprojecting below the bottorn thereof, of a reservoir rovided withsockets to receive the lugs, and) means for securing the lugs in thesockets, the lugs being of a length to space the reservoir from thebottom of the lantern-body.

2L The combination with a provided with apertured lu s pro'ectin belowthe bottom of the bo y an insu ated therefrom, of a reservoir providedwith sockets to receive the lugs, and pins for locking the lugs in thesockets, the lugs being of a length to space the reservoir from thebottom of the lantern-body.

lantern-body 3. The combination with a lantern-body having an aperturedplate spaced from the lower edge thereof, of -a reservoir secured to ithe body and having a coaming projecting from its upper face, saidcoaming encircling and closing the aperture in the said plate.

4. The combination with alantern-body having .spaced apertured plates,the lowermost one being spaced from the lower edge thereof, of a burnerclosing the aperture in the upper plate, a reservoir secured to thelantern-bod5r and provided with a coaming projecting from its upperface, said coaming encircling and closing the aperture of the lowerplate.

AUGUSTUS ROSENBERG.

Witnesses:

A. NUTTING, C. P. LEDDON.

